Revise Pharos and JSTOR descriptions in README

[elisa-vargas]

Updated the description of Pharos and JSTOR for to align with updated branding guidelines.

This change: (check at least one)

• Adds a new feature
• Fixes a bug
• Improves maintainability
• Improves documentation
• Is a release activity

Is this a breaking change? (check one)

• Yes
• No

Is the: (complete all)

• Title of this pull request clear, concise, and indicative of the issue number it addresses, if any?
• Test suite(s) passing?
• Code coverage maximal?
• Changeset added?

What does this change address?

This change updates README text based on feedback and revised copy provided by the Communications team. It addresses the need to align the README language with the latest approved messaging.

How does this change work?

• Replaces existing README copy with updated text provided by the copy manager
• Makes no functional or code-level changes
• Keeps the update limited to documentation/content only

Additional context

This is a text-only documentation update. There are no product, behavior, or implementation changes in this pull request.

[changeset-bot]

⚠️ No Changeset found

Latest commit: 0a1cc24

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